Brother HL-1660E User Manual page 235

USER'S GUIDE
Appendix–41
Ÿ 16 bit repeating compressed data
When the most significant 3 bits in the first 2 bytes are in the order 1, 0,
0, the remaining 13 bits indicate the number of times to repeat 16 bit data.
The following 2 bytes should be the 16 bit data to repeat.
15 14 13 12
1 0 0
Ÿ 8 bit repeating compressed data
When the most significant 3 bits in the first 2 bytes are in the order 1, 1,
0, the following 5 bits indicate the number of times to repeat 16 bits (two
by 8 bits) data. The remaining 8 bits should be the 8 bit data to repeat.
15 14 13 12
1 1 0 number of repeats
(5 bits)
Ÿ 4 bit repeating compression data
When the most significant 3 bits in the first 2 bytes are in the order 1, 0,
1, the following 4 bits indicate 4 bit data to repeat. The remaining 9 bits
indicate the number of times to repeat the 16 bit (4 by 4 bits) data.
15 14 13 12
1 0 1 data to repeat
(4 bits)
Ÿ Vertical repeating compressed data
When the most significant 3 bits in the first 2 bytes are in the order 1, 1,
1, the remaining 13 bits indicate the same data words as in the previous
line.
15 14 13 12
1 1 1 the same data words as in the previous line (13 bits)
The printer can not support the APT and HRC function in the 1200 dpi
printing mode.
number of repeats(13 bits)
data to repeat(16 bits)
8 7
data to repeat(8 bits)
9 8
number or repeats(9 bits)
0
0
0
0